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Mathematica > Symbolic Execution History >

Built-in Mathematica Symbol

TraceScan

TraceScan[f, expr]
applies f to all expressions used in the evaluation of expr.

TraceScan[f, expr, form]
includes only those expressions which match form.

TraceScan[f, expr, s]
includes all evaluations which use transformation rules associated with the symbol s.

TraceScan[f, expr, form, fp]
applies f before evaluation and fp after evaluation to expressions used in the evaluation of expr.

All expressions are wrapped in HoldForm to prevent evaluation before f or fp are applied to them.

The function fp is given as arguments both the form before evaluation and the form after evaluation.

Print all expressions used for evaluation:

Out[1]=

Count additions and multiplications of machine numbers needed for a numerical computation:

A recursive definition for finding Fibonacci numbers:

Count calls to fib required: